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ProcedureGDBFacadeSPI.java
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ProcedureGDBFacadeSPI.java
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/*
* Copyright (c) 2002-2018 "Neo4j,"
* Neo4j Sweden AB [http://neo4j.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.graphdb.facade.spi;
import java.io.File;
import java.net.URL;
import org.neo4j.function.ThrowingFunction;
import org.neo4j.graphdb.DependencyResolver;
import org.neo4j.graphdb.Result;
import org.neo4j.graphdb.event.KernelEventHandler;
import org.neo4j.graphdb.event.TransactionEventHandler;
import org.neo4j.graphdb.factory.module.DataSourceModule;
import org.neo4j.graphdb.security.URLAccessValidationError;
import org.neo4j.internal.kernel.api.Kernel;
import org.neo4j.internal.kernel.api.exceptions.TransactionFailureException;
import org.neo4j.internal.kernel.api.security.LoginContext;
import org.neo4j.internal.kernel.api.security.SecurityContext;
import org.neo4j.kernel.GraphDatabaseQueryService;
import org.neo4j.kernel.api.KernelTransaction;
import org.neo4j.kernel.api.explicitindex.AutoIndexing;
import org.neo4j.kernel.impl.core.ThreadToStatementContextBridge;
import org.neo4j.kernel.impl.coreapi.CoreAPIAvailabilityGuard;
import org.neo4j.kernel.impl.factory.GraphDatabaseFacade;
import org.neo4j.kernel.impl.query.QueryExecutionKernelException;
import org.neo4j.kernel.impl.query.TransactionalContext;
import org.neo4j.kernel.impl.store.StoreId;
import org.neo4j.values.virtual.MapValue;
public class ProcedureGDBFacadeSPI implements GraphDatabaseFacade.SPI
{
private final File databaseDirectory;
private final DataSourceModule sourceModule;
private final DependencyResolver resolver;
private final CoreAPIAvailabilityGuard availability;
private final ThrowingFunction<URL,URL,URLAccessValidationError> urlValidator;
private final SecurityContext securityContext;
private final ThreadToStatementContextBridge threadToTransactionBridge;
public ProcedureGDBFacadeSPI( DataSourceModule sourceModule, DependencyResolver resolver, CoreAPIAvailabilityGuard availability,
ThrowingFunction<URL,URL,URLAccessValidationError> urlValidator, SecurityContext securityContext,
ThreadToStatementContextBridge threadToTransactionBridge )
{
this.databaseDirectory = sourceModule.neoStoreDataSource.getDatabaseDirectory();
this.sourceModule = sourceModule;
this.resolver = resolver;
this.availability = availability;
this.urlValidator = urlValidator;
this.securityContext = securityContext;
this.threadToTransactionBridge = threadToTransactionBridge;
}
@Override
public boolean databaseIsAvailable( long timeout )
{
return availability.isAvailable( timeout );
}
@Override
public DependencyResolver resolver()
{
return resolver;
}
@Override
public StoreId storeId()
{
return sourceModule.storeId.get();
}
@Override
public File databaseDirectory()
{
return databaseDirectory;
}
@Override
public String name()
{
return "ProcedureGraphDatabaseService";
}
@Override
public Result executeQuery( String query, MapValue parameters, TransactionalContext tc )
{
try
{
availability.assertDatabaseAvailable();
return sourceModule.neoStoreDataSource.getExecutionEngine().executeQuery( query, parameters, tc );
}
catch ( QueryExecutionKernelException e )
{
throw e.asUserException();
}
}
@Override
public AutoIndexing autoIndexing()
{
return sourceModule.autoIndexing;
}
@Override
public void registerKernelEventHandler( KernelEventHandler handler )
{
throw new UnsupportedOperationException();
}
@Override
public void unregisterKernelEventHandler( KernelEventHandler handler )
{
throw new UnsupportedOperationException();
}
@Override
public <T> void registerTransactionEventHandler( TransactionEventHandler<T> handler )
{
throw new UnsupportedOperationException();
}
@Override
public <T> void unregisterTransactionEventHandler( TransactionEventHandler<T> handler )
{
throw new UnsupportedOperationException();
}
@Override
public URL validateURLAccess( URL url ) throws URLAccessValidationError
{
return urlValidator.apply( url );
}
@Override
public GraphDatabaseQueryService queryService()
{
return resolver.resolveDependency( GraphDatabaseQueryService.class );
}
@Override
public Kernel kernel()
{
return resolver.resolveDependency( Kernel.class );
}
@Override
public void shutdown()
{
throw new UnsupportedOperationException();
}
@Override
public KernelTransaction beginTransaction( KernelTransaction.Type type, LoginContext ignored, long timeout )
{
try
{
availability.assertDatabaseAvailable();
KernelTransaction kernelTx = sourceModule.kernelAPI.get().beginTransaction( type, this.securityContext, timeout );
kernelTx.registerCloseListener(
txId -> threadToTransactionBridge.unbindTransactionFromCurrentThread() );
threadToTransactionBridge.bindTransactionToCurrentThread( kernelTx );
return kernelTx;
}
catch ( TransactionFailureException e )
{
throw new org.neo4j.graphdb.TransactionFailureException( e.getMessage(), e );
}
}
}